http://gharee.com/wiki/index.php?action=history&feed=atom&title=AnalogWrite%28%29 2025-06-28T15:58:39Z 本wiki的該頁(yè)面的版本歷史 MediaWiki 1.21.2 http://gharee.com/wiki/index.php?title=AnalogWrite()&diff=88&oldid=prev 2014-09-12T06:20:28Z

<p>以“&lt;pre style=&quot;color:blue&quot;&gt; void analogWrite (uint8_t pin, int value) &lt;/pre&gt; 寫(xiě)模擬引腳 &lt;br&gt; 參數(shù):&lt;br&gt; *pin 引腳編號(hào) *value 0到255之間的值, 0對(duì)...”為內(nèi)容創(chuàng)建頁(yè)面</p> <p><b>新頁(yè)面</b></p><div>&lt;pre style=&quot;color:blue&quot;&gt;<br /> void analogWrite (uint8_t pin, int value) <br /> &lt;/pre&gt;<br /> 寫(xiě)模擬引腳 &lt;br&gt;<br /> 參數(shù):&lt;br&gt;<br /> *pin 引腳編號(hào) <br /> *value 0到255之間的值, 0對(duì)應(yīng)off, 255對(duì)應(yīng)on <br /> <br /> 寫(xiě)一個(gè)模擬值(PWM)到引腳. 可以用來(lái)控制LED的亮度, 或者控制電機(jī)的轉(zhuǎn)速. 在執(zhí)行該操作后, 應(yīng)該等待一定時(shí)間后才能對(duì)該引腳進(jìn)行下一次的讀或?qū)懖僮? PWM的頻率大約為490Hz.&lt;br&gt;<br /> <br /> 在一些基于ATmega168的新的Arduino控制板(如Mini 和BT)中, 該函數(shù)支持以下引腳: 3, 5, 6, 9, 10, 11. 在基于ATmega8的型號(hào)中支持9, 10, 11引腳.&lt;br&gt;<br /> <br /> 例子:&lt;br&gt;<br /> <br /> &lt;pre style=&quot;color:green&quot;&gt;<br /> int ledPin = 9; // LED connected to digital pin 9<br /> int analogPin = 3; // potentiometer connected to analog pin 3<br /> int val = 0; // variable to store the read value<br /> <br /> void setup()<br /> {<br /> pinMode(ledPin, OUTPUT); // sets the pin as output<br /> }<br /> <br /> void loop()<br /> {<br /> val = analogRead(analogPin); // read the input pin<br /> analogWrite(ledPin, val / 4); // analogRead values go from 0 to 1023, analogWrite values from 0 to 255<br /> }<br /> &lt;/pre&gt;</div>

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